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本帖最后由 yxlk 于 2019-7-18 17:55 编辑 7 O9 _' G) r/ X g6 N
: w8 {2 N5 }6 h, D6 M! D1 lvoid TIM4_Configuration(void), r# t6 [$ E( h9 {2 ]7 l* }3 U
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u32 temp;
+ z; b4 c* i, K; g TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;( r6 S, L6 G7 q; _2 |0 G: q' @
TIM_OCInitTypeDef TIM_OCInitStruct;
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temp = SystEMCoreClock / 1000000;5 I3 x! e4 k1 n: T* i
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE); , C) ~! J4 i7 X3 p& T! o
TIM_DeInit(TIM4);8 |; Y1 o" C2 J) H7 ]
if(SystemCoreClock > 36000000)
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TIM_TimeBaseInitStruct.TIM_Prescaler = 1;
( b. b1 N! ^" P( Z TIM_TimeBaseInitStruct.TIM_Period = PWM_Period * temp / 2;1 l& W+ T/ F4 o2 V4 B+ {0 L# S/ ^+ Q
TIM_OCInitStruct.TIM_Pulse = PWM_Recharge * temp / 2;0 j) P# M9 N1 | Z6 K" p1 w# K
}
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{
8 q* h" X2 o& t, V% K# N TIM_TimeBaseInitStruct.TIM_Prescaler = 0;
- x6 d4 {! e2 q: J$ M0 d# Q TIM_TimeBaseInitStruct.TIM_Period = PWM_Period * temp;, ^! {3 s- V% r1 \4 ]. }- }
TIM_OCInitStruct.TIM_Pulse = PWM_Recharge * temp;
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& A% l# s) `& L0 I4 y! U$ d TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
- _% @ P$ ?* P: V TIM_TimeBaseInitStruct.TIM_ClockDivision = TIM_CKD_DIV1;; {1 r' L) D' {, ~ l8 {) ^* U
TIM_TimeBaseInit(TIM4, &TIM_TimeBaseInitStruct);! p) E: s0 K, i4 y: X. F
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TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;% H! Z% A7 E9 L
TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Disable;
1 v$ d% v1 W' @" j1 {, _$ {3 E& J( n# w9 i TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
% R1 t! \* P8 Q4 Q. e P- ` TIM_OC1Init(TIM4, &TIM_OCInitStruct);4 u7 e3 q ]; P2 C; H8 q) O
TIM_OC2Init(TIM4, &TIM_OCInitStruct);
+ w a; z" C1 ], {% _' c0 N TIM_OC3Init(TIM4, &TIM_OCInitStruct);
1 m% @1 @4 r: q) ~ TIM_OC4Init(TIM4, &TIM_OCInitStruct);' ~% P8 d" S3 G2 c, ~$ L8 P6 z/ Y
# m3 {5 A# k* F: [# [, L$ k- J TIM_OC1PreloadConfig(TIM4, TIM_OCPreload_Enable);
% e* d* J, L- B3 W- U; b9 A TIM_OC2PreloadConfig(TIM4, TIM_OCPreload_Enable);6 K) W% F C6 K3 Q- D
TIM_OC3PreloadConfig(TIM4, TIM_OCPreload_Enable);8 r$ s x6 T( W% _4 f
TIM_OC4PreloadConfig(TIM4, TIM_OCPreload_Enable);0 k. D" g7 q4 r
TIM_CCxCmd(TIM4, TIM_Channel_1, TIM_CCx_Enable);1 a" _5 I: |1 o6 V. W. I
TIM_CCxCmd(TIM4, TIM_Channel_2, TIM_CCx_Enable);
& W7 s b. `! X, g% L+ O3 V TIM_CCxCmd(TIM4, TIM_Channel_3, TIM_CCx_Enable);
$ |$ e2 A5 I- ]5 D TIM_CCxCmd(TIM4, TIM_Channel_4, TIM_CCx_Enable);
! v. @$ h/ x3 c3 S0 e! L TIM_ARRPreloadConfig(TIM4, ENABLE); f0 P; Z: w \
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TIM_CleaRFlag(TIM4, TIM_FLAG_Update);
" E& n# E- N, O& X- ~& t TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
& M, \% ^9 j) g" `* @ ^ TIM_Cmd(TIM4, ENABLE);- P- a- k8 G4 t# W4 N- [
% @; G/ ~% S; D( L TIM_CCxCmd(TIM4, TIM_Channel_2, TIM_CCx_Disable); //放在这里面起作用
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。
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TIM4_Configuration();) P2 u8 Y* ?6 G3 @6 u) ~
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//期望随时单独失能某一通道，但这样不起作用： 3 L6 H n( S( {0 A3 H
TIM_CCxCmd(TIM4, TIM_Channel_2, TIM_CCx_Disable);0 A$ p8 I7 y! V2 ^* R- b
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发表于 2019-7-18 17:26
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